EasyCFD Fluid flow and heat transfer

Examples

Original EasyCFD worked cases

Explore complete problem definitions, calculated fields and links to the corresponding step-by-step tutorials.

01

Worked example

Natural convection inside a cylindrical annulus

Laminar, steady natural convection in a concentric annulus for Pr = 0.7 and Gr = 5.0 × 10⁴. The original site notes two solutions associated with a bifurcation.

Problem definition and boundary temperatures for the concentric annulus.
Temperature contours and velocity-vector field for the second solution, showing two vortices.

Tutorials and movies

02

Worked example

Transient conjugate heat transfer in a cavity

Heat conduction in the solid regions and natural convection in the enclosed air are solved simultaneously as the initially non-uniform temperature field evolves.

Problem definition at the initial time: air, copper and steel regions with their dimensions and temperatures.
Temperature contours and velocity-vector field at t = 6.0 s.

Tutorial

03

Worked example

Transient air–CO2 mixing

Air and carbon dioxide enter a baffled, slightly convergent channel through separate inlets. The CO2 inlet varies with time, while the air inlet has a spatially varying velocity profile.

Problem definition: geometry, baffles and the time- and space-dependent inlet conditions.

Tutorial and final visualization

Final transient visualization

Eight-second visualization of the evolving CO2 mass-fraction field and flow streamlines.

04

Worked example

Flow through an anisotropic porous filter

An inclined porous insert has a preferred flow direction and a transverse resistance ten times larger, producing a directional pressure loss and a visible deflection of the streamlines.

Problem definition: geometry, dimensions, boundary conditions and porous-medium settings.

Tutorial

05

Worked example

Turbulent flow around a vehicle

An example of external turbulent flow over a simplified vehicle shape.

Structured generalized mesh around the vehicle.
Streamlines and velocity contours for the flow over the vehicle.
06

Worked example

Pulsatile flow inside a symmetric channel with wavy walls

This example uses table functions to impose a time-dependent inlet and outlet velocity over a cycle that includes flow reversal.

Inlet Reynolds number as a function of time.
Main geometrical parameters of the symmetric channel with wavy walls.
MoviesVisualization movie
07

Worked example

Turbulent flow around a NACA 2412 airfoil

Turbulent flow over a NACA 2412 airfoil at Re = 3.2 × 10⁶ using an unstructured mesh. The tutorials include importing profile coordinates and calculating aerodynamic forces.

Problem definition for the NACA 2412 airfoil calculation.
Unstructured mesh around the NACA 2412 airfoil.
Lift coefficient versus incidence angle: EasyCFD results and experimental data.

Tutorials and movies

Transient velocity-field visualization

Accelerated 4× visualization of the unsteady separated flow.